Scissors sharpener



M r 1930. A. H. BROUGHER SCISSORS SI-IARPENER Filed June 1 1924 4. 1BPOUCiA-VEZQ. INVENTOR ATTORNEY Patented Mar. 11, 1930 UNITED STATESPATENT OFFICE.

scIssons 'snanrnn'na Application filed June 14,

This invention relates to a sharpening device, and more particularly toa scissors sharpener.

One of the main objects of the invention is 6 to provide simple andefiic-ient means whereby edged tools, such as shears, scissors, etc,

can be uickly and easily sharpened. A

further ject is to provide a device of this character of simpleconstruction which may be readily produced at comparatively small cost.Further objects will appear from the detail description.

In the drawings Fig. 1 is a side view of the sharpener;

Fig. 2 is a front view;

Fig. 3 is a top plan view.

The sharpener includes a clamping device or vise formed of jaws 1 and 2hinged together at their lower ends at 3 and forced toward ,0 each otherby means of a wing nut 4 threaded on a screw-stud 5 secured in jaw 1 andextending through jaw Preferably, though not necessarily, an expansionspring 6 is mounted a out stud 5 and confined between the jaws s0 as tomove jaw 2 away from jaw 1 for opening the vise or clamp when nut 4 isthreaded oil of the stud. Jaw 1 of the vise is provided with a dependingL-shaped arm 7 through the lower element of which is threaded a pressurescrew 8 which co-operates with lugs 9 between which element 10 of jaw 2is hingedly secured,

1 to form a clamp for securing the vise to .a

bench or other support.

. Jaw 1 is provided at its upper end with a substantially L-shapedsupporting arm 11 at the upper end of which is formed a slotted head 12in which is pivotally secured, by a pin 13, an eye 14 provided at theupper end of an operating rod 15. A cylindrical abrasive member 16, suchas a. file or a cylinder of any suitable or preferred abrasive material,is

loosely mounted on rod 15 and is urged in a direction away from head 12by means of an expansion coil spring 17 mounted about the rod andconfined bet-ween head 12 and member 16. A pinion 17 is secured on thelower end of member 16 and meshes with a rack 18 carried by jaw 12, thisrack being concentric with the pin 13. For convenience in operation, ahandle 19 is provided at the lower end.

1924. Serial No. 720,060.

of rod 15, and downward movement of pinion 17, and consequently member16, is positively limited by a flange 20 extending upwardly from theouter portion of rack 18.

In using the device, blade A of a pair of' shears or scissors, issecurely clamped between jaws 1 and 2 in such position that member 16 isin contact with the portion of the blade which it is desired to sharpen.In this connection, attention is called to the fact that rod 15 isdisposed at an angle across the vise, this angle corresponding to theusual angle or bevel which is given to the cutting edges of scissors,shears, and similar tools. When blade A is in position in the vise andproperly adjusted for sharpening, member 16 is in contact with the bladeand is held raised slightly so as to hold the teeth of pinion 17 spaceda slight distance. above the teeth of rack 18, as illustrated in Fig. 3.By grasping handle 19 and movin rod 15 back and forth about pin 13, theabrasive member 16 is rotated so as to grind the edge of blade A at theproper angle thus sharpening the blade.

During this operation downward pressure is exerted 011 handle 19 thusgiving a spring pressure on member 16, it being understood that rod 15possesses appreciable resiliency for this purpose. When the blade hasbeen sharpenedor' round down to the desired extent, the teet of pinion17 enter to their full extent between the teeth of rack 18 thus limitingdownward movement of member 16 so that this member exerts no furtherrinding effect upon the blade. After a portlon of the blade has beenground in this manner, the blade may be released and readjusted in thevise, after which another portion of the blade is ground,.this beingcontinued until the blade has been ground for its full length. Forsharpening scissors and shears having comparatively short blades, therack 18 and associated parts may be made of sufiicient length to sharpenthe blade for the full length thereof at one portion. The properadjustment of member 16 may be readily accomplished by inserting a wedgeor block of a predetermined thickness between the u per end of jaw 2 andmember 16, after w nch blade A may be adjusted so as to contact withmember 16, the blade being then securely clamped-in the vise, afterwhich the block is removed and the blade ground in the manner described.

What I claim is A tool sharpening device comprising a vise including jawmembers hingedly secured to each other, means for securing the jawmembers with respect to a fixed sup ort, a sup- 10 porting arm formedwith and extendin from onelof said jaw members, a slotted hea formedwith the free end of said arm, a rod having one end pivotally secured inthe slot of the head, a rack formed with the other 15 arm and arrangedconcentrically with respect to the pivot of the rod, a handle formedwith the free end of said rod, a pinion mounted on the rod, acylindrical abrasive member mounted on said rod and meshing with the 20teeth of the rack, a coil spring having its end convolutions engageablewith the slotted head and adjacent end of the abrasive memberrespectively, said jaw members being adapted to receive a tool forarrangement in the path 25 of the abrasive member, and said abrasivemember being disposed at an inclination.

In testimony whereof I aiiix my signature.

ALVIN HUDSON BROUGHER.

